#MC # gitsigns-nvim: git support
{ config, pkgs, stdenv, lib, ... }:
let
  my-gitsigns-nvim = {
    plugin = pkgs.vimPlugins.gitsigns-nvim;
    type = "lua";
    config = ''
      require('gitsigns').setup {
        signs_staged_enable = false,
        signcolumn = false,
        numhl      = true,
        linehl     = true,

        current_line_blame = true,

        -- keymaps
        on_attach = function(bufnr)
          local gs = package.loaded.gitsigns

          local function map(mode, l, r, opts)
            opts = opts or {}
            opts.buffer = bufnr
            vim.keymap.set(mode, l, r, opts)
          end

          -- Navigation
          map('n', ']c', function()
            if vim.wo.diff then return ']c' end
            vim.schedule(function() gs.next_hunk() end)
            return '<Ignore>'
          end, {expr=true})

          map('n', '[c', function()
            if vim.wo.diff then return '[c' end
            vim.schedule(function() gs.prev_hunk() end)
            return '<Ignore>'
          end, {expr=true})

          -- Actions
          map({'n', 'v'}, '<leader>hs', ':Gitsigns stage_hunk<CR>')
          map({'n', 'v'}, '<leader>hr', ':Gitsigns reset_hunk<CR>')
          map('n', '<leader>hS', gs.stage_buffer)
          map('n', '<leader>hu', gs.undo_stage_hunk)
          map('n', '<leader>hR', gs.reset_buffer)
          map('n', '<leader>hp', gs.preview_hunk)
          map('n', '<leader>hb', function() gs.blame_line{full=true} end)
          map('n', '<leader>tb', gs.toggle_current_line_blame)
          map('n', '<leader>hd', gs.diffthis)
          map('n', '<leader>hD', function() gs.diffthis('~') end)
          map('n', '<leader>td', gs.toggle_deleted)

          -- Text object
          map({'o', 'x'}, 'ih', ':<C-U>Gitsigns select_hunk<CR>')
        end
      }
    '';
  };
in {
  programs.neovim = {
    plugins = [
      my-gitsigns-nvim
    ];
  };
}
